XML 32 R17.htm IDEA: XBRL DOCUMENT v3.10.0.1
ALLOWANCE FOR DOUBTFUL ACCOUNTS:
6 Months Ended
Sep. 30, 2018
Valuation and Qualifying Accounts [Abstract]  
ALLOWANCE FOR DOUBTFUL ACCOUNTS: ALLOWANCE FOR DOUBTFUL ACCOUNTS: Trade accounts receivable are presented net of allowances for doubtful accounts, returns and credits of $2.7 million at September 30, 2018 and $3.1 million at March 31, 2018.